diff --git a/examples/example_1/makefile b/examples/example_1/makefile
index 6c73383..a9c7566 100644
--- a/examples/example_1/makefile
+++ b/examples/example_1/makefile
@@ -6,6 +6,7 @@
 
 UNITY_ROOT=../..
 C_COMPILER=gcc
+CFLAGS=-std=c99
 TARGET_BASE1=test1
 TARGET_BASE2=test2
 ifeq ($(OS),Windows_NT)
@@ -31,8 +32,8 @@ all: clean default
 default:
 #	ruby auto/generate_test_runner.rb test/TestProductionCode.c  test/test_runners/TestProductionCode_Runner.c
 #	ruby auto/generate_test_runner.rb test/TestProductionCode2.c test/test_runners/TestProductionCode2_Runner.c
-	$(C_COMPILER) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES1) -o $(TARGET1)
-	$(C_COMPILER) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES2) -o $(TARGET2)
+	$(C_COMPILER) $(CFLAGS) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES1) -o $(TARGET1)
+	$(C_COMPILER) $(CFLAGS) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES2) -o $(TARGET2)
 	./$(TARGET1)
 	./$(TARGET2)
 
diff --git a/examples/example_3/makefile b/examples/example_3/makefile
index 05e7e69..0d9d0ea 100644
--- a/examples/example_3/makefile
+++ b/examples/example_3/makefile
@@ -6,6 +6,7 @@
 
 UNITY_ROOT=../..
 C_COMPILER=gcc
+CFLAGS=-std=c99
 TARGET_BASE1=test1
 TARGET_BASE2=test2
 ifeq ($(OS),Windows_NT)
@@ -31,8 +32,8 @@ all: clean default
 default:
 #	ruby auto/generate_test_runner.rb test/TestProductionCode.c  test/no_ruby/TestProductionCode_Runner.c
 #	ruby auto/generate_test_runner.rb test/TestProductionCode2.c test/no_ruby/TestProductionCode2_Runner.c
-	$(C_COMPILER) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES1) -o $(TARGET1)
-	$(C_COMPILER) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES2) -o $(TARGET2)
+	$(C_COMPILER) $(CFLAGS) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES1) -o $(TARGET1)
+	$(C_COMPILER) $(CFLAGS) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES2) -o $(TARGET2)
 	./$(TARGET1)
 	./$(TARGET2)